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參數(shù)資料
| 型號： | AD812ARZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP DUAL CURR-FDBK 8-SOIC |
| 標準包裝： | 750 |
| 應用： | 電流反饋 |
| 電路數(shù)： | 2 |
| -3db帶寬： | 145MHz |
| 轉換速率： | 1600 V/µs |
| 電流 - 電源： | 4.5mA |
| 電流 - 輸出 / 通道： | 50mA |
| 電壓 - 電源，單路/雙路(±)： | 2.4 V ~ 36 V，±1.2 V ~ 18 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 帶卷 (TR) |
AD812
REV. B
–16–
Operation Using a Single Supply
The AD812 will operate with total supply voltages from 36 V
down to 2.4 V. With proper biasing (see Figure 53), it can be an
outstanding single supply video amplifier. Since the input and
output voltage ranges extend to within 1 volt of the supply rails,
it will handle a 1.3 V p-p signal on a single 3.3 V supply, or a
3 V p-p signal on a single 5 V supply. The small signal, 0.1 dB
bandwidths will exceed 10 MHz in either case, and the large
signal bandwidths will exceed 6 MHz.
The capacitively coupled cable driver in Figure 53 will achieve
outstanding differential gain and phase errors of 0.07% and 0.06
degrees respectively on a single 5 V supply. Resistor R2, in this
circuit, is selected to optimize the differential gain and phase by
operating the amplifier in its most linear region. To optimize the
circuit for a 3 V supply, a value of 8 k
is recommended for R2.
AD812
8
4
VIN
R2
11.8k
VOUT
75
+VS
R3
1k
75
CABLE
R1
9k
C1
2 F
C3
30 F
649
COUT
47 F
C2
1 F
Figure 53. Biasing for Single Supply Operation
8-Lead Plastic DIP
(N-8)
8
14
5
PIN 1
SEATING
PLANE
0.060 (1.52)
0.015 (0.38)
0.165
0.01
(4.19
0.25)
0.10
(2.54)
BSC
0.325 (8.25)
0.300 (7.62)
0.015 (0.381)
0.008 (0.204)
0.195 (4.95)
0.115 (2.93)
0.39 (9.91)
0.25
(6.35)
0.125 (3.18)
MIN
0.018
0.003
(0.46 +0.08)
0.033 (0.84)
NOM
8-Lead Plastic SOIC
(SO-8)
0.1968 (5.00)
0.1890 (4.80)
85
4
1
0.2440 (6.20)
0.2284 (5.80)
PIN 1
0.1574 (4.00)
0.1497 (3.80)
0.0688 (1.75)
0.0532 (1.35)
SEATING
PLANE
0.0098 (0.25)
0.0040 (0.10)
0.0192 (0.49)
0.0138 (0.35)
0.0500
(1.27)
BSC
0.0098 (0.25)
0.0075 (0.19)
0.0500 (1.27)
0.0160 (0.41)
8
0
0.0196 (0.50)
0.0099 (0.25)
45
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
PRINTED
IN
U.S.A.
C1859b–0–9/98
–0.5
–3.0
1
10
1000
100
–1.0
–1.5
–2.0
–2.5
0
0.5
–270
–180
–90
0
FREQUENCY – MHz
CLOSED-LOOP
GAIN
–
dB
PHASE
SHIFT
–
Degrees
–3.5
VS = 5V
90
GAIN
PHASE
Figure 54. Closed-Loop Gain and Phase vs. Frequency,
Circuit of Figure 53
10
90
100
0%
500mV
1V
50ns
VIN
VOUT
Figure 55. Pulse Response of the Circuit of Figure 53 with
VS = 5 V
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